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 1-4 of 4 results.

A161191 Primes in A161190.

Original entry on oeis.org

281, 857, 1433, 2459, 1163, 1381, 7213, 4729, 2143, 2591, 13411, 8783, 2971, 9311, 9733, 9931, 11423, 12037, 4357, 4703, 4831, 4933, 27743, 5903, 6011, 30259, 6491, 6827, 20879, 35059, 7151, 7759, 8219, 25321, 8501, 25849, 8863, 9067, 9227, 29641
Offset: 1

Views

Author

Enoch Haga, Jun 06 2009

Keywords

Examples

			a(1)=281 because 281 is prime and also the sum of the primes in the 4 diagonals: 11+31+37+43+47+53+59 = 281

Crossrefs

Cf. A161190 - A161194

Formula

A161190 INTERSECT A000040.

A161194 Index of last term where no prime sums occur in A161190 in a 4 diagonal set of 24 terms.

Original entry on oeis.org

88, 116, 149, 178, 207, 220, 258, 259, 307, 322, 326, 343, 344, 367, 380, 427, 498, 533, 550, 557, 558, 564, 628, 638, 652, 718, 742, 743, 751, 767, 795, 818, 860, 863, 891, 999, 1000, 1008, 1009, 1028, 1034, 1078, 1088, 1094, 1111, 1138, 1199, 1230, 1234
Offset: 1

Views

Author

Enoch Haga, Jun 06 2009

Keywords

Comments

This sequence comprises the indices for A161193.

Examples

			a(1)=88 because that is the index of the first set of 24 terms in 4 diagonals where none is prime.

Crossrefs

Cf. A161190, A161191, A161192, A161193.

Programs

Formula

These are the indices for the sets of 4 diagonals (comprising the 24 points on the circumference of a circle) where no primes occur.

A161193 Last term where no prime sums occur in A161190 in a 4-diagonal set of 24 terms.

Original entry on oeis.org

5637, 7429, 9541, 11397, 13253, 14085, 16517, 16581, 19653, 20613, 20869, 21957, 22021, 23493, 24325, 27333, 31877, 34117, 35204, 35653, 35717, 36101, 40197, 40837, 41733, 45957, 47493, 47557, 48069, 49093, 50885, 52357, 55045, 55237
Offset: 1

Views

Author

Enoch Haga, Jun 06 2009

Keywords

Comments

This sequence is a subsequence of A161190.

Examples

			a(1)=5637 because that is the last term of 24, none of which are prime. In A161190 it would be indicated with a zero (0). However, the first set of 4 diagonals with no prime sum does not occur until index 88.

Crossrefs

Cf. A161190, A161191, A161192, A161194.

Programs

Formula

These are the last terms in a set of 4 diagonals (comprising 24 points on the circumference of a circle).

A161192 Consecutive pairs of prime point sums in A161191 (includes triples).

Original entry on oeis.org

1381, 7213, 2591, 13411, 8783, 2971, 9733, 9931, 4831, 4933, 5903, 6011, 30259, 20879, 35059, 25321, 8501, 10223, 30841, 10559, 31817, 11173, 11243, 36767, 12347, 13567, 13627, 41039, 14251, 42937, 17099, 51539, 17231, 18443, 55579, 18587
Offset: 1

Views

Author

Enoch Haga, Jun 06 2009

Keywords

Comments

This sequence is a subsequence of A161191.

Examples

			a(1) and a(2) above, 1381 and 7213, are A161191(6) and A161191(7).

Crossrefs

Cf. A161190, A161191, A161193, A161194.

Programs

Formula

Select pairs (including triples) of prime point sums in A161191.
Showing 1-4 of 4 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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