cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-6 of 6 results.

A275965 Leftmost column of array A275960.

Original entry on oeis.org

1, 4, 18, 216, 1794, 16050, 161748, 1754886, 20252058, 257046648, 9715067802, 169069882650, 3334258948644, 65130972856014, 1314162130657122, 27756075741907992, 599859130159322082, 13631049605170919850, 318062816759187443364, 7775218520916136276470, 195524294317191054759258, 5132224614520884668600904, 139264442985628101392954898
Offset: 1

Views

Author

Antti Karttunen, Aug 13 2016

Keywords

Comments

Inverse binomial transform of A265907 (when both are considered as offset-0 sequences).

Crossrefs

Cf. also A275955.

Programs

A275961 Transpose of array A275960.

Original entry on oeis.org

1, 4, 5, 18, 22, 27, 216, 234, 256, 283, 1794, 2010, 2244, 2500, 2783, 16050, 17844, 19854, 22098, 24598, 27381, 161748, 177798, 195642, 215496, 237594, 262192, 289573, 1754886, 1916634, 2094432, 2290074, 2505570, 2743164, 3005356, 3294929, 20252058, 22006944, 23923578, 26018010, 28308084, 30813654, 33556818, 36562174, 39857103
Offset: 1

Views

Author

Antti Karttunen, Aug 13 2016

Keywords

Comments

See A275960.

Crossrefs

Transpose: A275960.

Programs

A275950 Square array A(1,k) = A265905(k), A(n>1,k) = A(n-1, k+1) - A(n-1, k); successive differences of A265905 read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), ...

Original entry on oeis.org

1, 3, 2, 11, 8, 6, 49, 38, 30, 24, 291, 242, 204, 174, 150, 1979, 1688, 1446, 1242, 1068, 918, 15217, 13238, 11550, 10104, 8862, 7794, 6876, 136659, 121442, 108204, 96654, 86550, 77688, 69894, 63018, 1349627, 1212968, 1091526, 983322, 886668, 800118, 722430, 652536, 589518, 14561425, 13211798, 11998830, 10907304, 9923982, 9037314, 8237196, 7514766, 6862230, 6272712
Offset: 1

Views

Author

Antti Karttunen, Aug 13 2016

Keywords

Examples

			The top left 7 x 8 corner of the array:
      1, 3, 11, 49, 291, 1979, 15217
      2, 8, 38, 242, 1688, 13238, 121442
      6, 30, 204, 1446, 11550, 108204, 1091526
     24, 174, 1242, 10104, 96654, 983322, 10907304
    150, 1068, 8862, 86550, 886668, 9923982, 123958350
    918, 7794, 77688, 800118, 9037314, 114034368, 1514355678
   6876, 69894, 722430, 8237196, 104997054, 1400321310, 20026187676
  63018, 652536, 7514766, 96759858, 1295324256, 18625866366, 291196957578
		

Crossrefs

Transpose: A275951.
Row 1: A265905, row 2: A265906, row 3: A275953.
Column 1: A275955.
Cf. A153880.
Variant: A275960.

Programs

Formula

A(1,k) = A265905(k); and for n > 1, A(n,k) = A(n-1, k+1) - A(n-1, k).

A265907 a(1) = 1; for n > 1, a(n) = a(n-1) + A255411(a(n-1)).

Original entry on oeis.org

1, 5, 27, 283, 2783, 27381, 289573, 3294929, 39857103, 518345071, 13445878403, 294076667433, 6072420019897, 124655463124661, 2601261501948003, 56085731405159779, 1245017012007286199, 28675043602269632757, 682496208885074229469, 16855397487443215829585, 430393080285140358451479, 11389515859337776256294767
Offset: 1

Views

Author

Antti Karttunen, Dec 20 2015

Keywords

Comments

In factorial base (A007623) these numbers look as:
1, 21, 1011, 21301, 350321, 5300311, 71310201, 905513221, , ...

Crossrefs

Row 1 of A275960.
Binomial transform of A275965 (when both are considered as offset-0 sequences).
Cf. A265908 (first differences), A265905 (variant).
Subsequence of A256450.

Formula

a(1) = 1; for n > 1, a(n) = a(n-1) + A255411(a(n-1)).

Extensions

Note about binomial transform corrected - Antti Karttunen, Sep 20 2016

A265908 a(n) = A255411(A265907(n)); also the first differences of A265907.

Original entry on oeis.org

4, 22, 256, 2500, 24598, 262192, 3005356, 36562174, 478487968, 12927533332, 280630789030, 5778343352464, 118583043104764, 2476606038823342, 53484469903211776, 1188931280602126420, 27430026590262346558, 653821165282804596712, 16172901278558141600116, 413537682797697142621894, 10959122779052635897843288, 300659352550430117464479652
Offset: 1

Views

Author

Antti Karttunen, Dec 20 2015

Keywords

Comments

In factorial base (A007623) these numbers are almost just like those of A265906, but shifted once left, with an extra zero appended, and then each nonzero digit incremented by one:
20, 320, 20220, 324020, 4604320, 64004220, 824203020, , ...

Crossrefs

Row 2 of A275960.
First differences of A265907.

Formula

a(n) = A255411(A265907(n))
a(n) = A265907(n+1) - A265907(n).

A275963 First differences of A265908; second differences of A265907.

Original entry on oeis.org

18, 234, 2244, 22098, 237594, 2743164, 33556818, 441925794, 12449045364, 267703255698, 5497712563434, 112804699752300, 2358022995718578, 51007863864388434, 1135446810698914644, 26241095309660220138, 626391138692542250154, 15519080113275337003404, 397364781519139001021778, 10545585096254938755221394, 289700229771377481566636364
Offset: 1

Views

Author

Antti Karttunen, Aug 13 2016

Keywords

Crossrefs

Row 3 of A275960.

Programs

Formula

a(n) = A265908(1+n) - A265908(n).
Showing 1-6 of 6 results.