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.

Previous Showing 11-16 of 16 results.

A367354 Analog of A121805, but starting with 10.

Original entry on oeis.org

10, 11, 23, 58, 139, 231, 243, 275, 328, 412, 436, 501, 516, 581, 596, 662, 688, 775, 833, 871, 889, 988, 1069, 1160, 1161, 1172, 1193, 1224, 1265, 1316, 1377, 1448, 1529, 1620, 1621, 1632, 1653, 1684, 1725, 1776, 1837, 1908, 1989, 2081, 2093, 2125, 2177, 2249, 2341, 2353
Offset: 1

Views

Author

N. J. A. Sloane, Nov 17 2023

Keywords

Comments

Contains 20573 terms, the last of which is 999936.

Crossrefs

Comma sequences in base 10, starting with 1, 2, 4, 5, 6, 7, 8, 9, 10 are A121805, A139284, A366492, A367337, A367350, A367351, A367352, A367353, A367354. Starting with 3 is trivial, and those starting with 11, 12, 13 are essentially duplicates.

Programs

  • Mathematica
    a[1] = b = 10; m = b - 1; a[n_] := a[n] = For[r = Mod[a[n - 1], b]; y = 0, y <= m, y++, If[y == IntegerDigits[#, b][[1]], Return[#]] &[a[n - 1] + b r + y]]; Array[a, 50] (* Michael De Vlieger, Nov 18 2023, after Jean-François Alcover at A121805 *)
  • Python
    from itertools import islice
    def agen(start=10): # generator of terms
        an, y = start, 1
        while y < 10:
            yield an
            an, y = an + 10*(an%10), 1
            while y < 10:
                if str(an+y)[0] == str(y):
                    an += y
                    break
                y += 1
    print(list(islice(agen(), 50))) # Michael S. Branicky, Nov 18 2023

A367364 Record high-points in A330128.

Original entry on oeis.org

2137453, 194697747222394, 209534289952018960, 2153441655319779164332, 195152998207833388640389, 192648330068920004741771823742285752
Offset: 1

Views

Author

N. J. A. Sloane, Nov 24 2023

Keywords

Crossrefs

A367598 is a base-3 analog.

Extensions

a(6) from Michael S. Branicky, Nov 26 2023

A367365 Indices of record high-points in A330128.

Original entry on oeis.org

1, 2, 6, 40, 4000, 20000
Offset: 1

Views

Author

N. J. A. Sloane, Nov 24 2023

Keywords

Comments

A367599 is a base-3 analog, and includes the terms 2*3, 2*3^2, 2*3^6, which may be analogous to the terms 4*10 and 4*10^3 here.
a(7) <= 80000000000; see linked a-file for indices in A037124 producing increasingly high values of A330128. - Michael S. Branicky, Dec 05 2023

Crossrefs

A367599 is a base-3 analog.

Extensions

a(6) from Michael S. Branicky, Nov 26 2023

A367601 a(n) is the number of terms in the analog of A121805 but starting with A037124(n), or -1 if that sequence is infinite.

Original entry on oeis.org

2137453, 194697747222394, 2, 199900, 19706, 209534289952018960, 15, 198104936410, 19511030, 20573, 19278442756937613, 207556412347088426, 2153441655319779164332, 1960210914, 204, 19, 195607586, 21, 19511029, 1922379655900, 15, 1979, 191782579276710577865, 1927
Offset: 1

Views

Author

Keywords

Comments

This is by definition a subsequence of A330128.

Crossrefs

For records see A367602 and A367603.

A367602 Records in A367601.

Original entry on oeis.org

2137453, 194697747222394, 209534289952018960, 2153441655319779164332, 195152998207833388640389, 192648330068920004741771823742285752, 1879472501974027932230497653831908067612145407102, 2071675282852490774827341955075117685752805692835677843166, 20548999112584138590755517725134777010151822745525893951682
Offset: 1

Views

Author

Michael S. Branicky, Dec 06 2023

Keywords

Comments

Is this the same as A367364? - R. J. Mathar, Dec 12 2023

Crossrefs

A367603 Indices of records in A367601.

Original entry on oeis.org

1, 2, 6, 40, 4000, 20000, 80000000000, 40000000000000000000000000000, 30000000000000000000000000000000, 3000000000000000000000000000000000000000, 6000000000000000000000000000000000000000
Offset: 1

Views

Author

Michael S. Branicky, Dec 06 2023

Keywords

Crossrefs

Previous Showing 11-16 of 16 results.