A219526 Number of 3 x 3 squares filled by 9 consecutive primes prime(n) to prime(n+8) such that sums along rows, columns and diagonals are primes.

928, 4360, 3648, 2816, 2208, 2120, 1520, 0, 688, 768, 936, 560, 1112, 544, 80, 384, 624, 320, 1568, 120, 32, 0, 168, 56, 272, 160, 24, 168, 32, 72, 776, 440, 24, 208, 32, 0, 24, 224, 648, 680, 0, 152, 56, 24, 16, 0, 0, 0, 0, 0, 0, 24, 0, 184, 160, 16, 32, 40

Offset

2,1

Comments

All terms are multiples of 8.

Links

Zak Seidov, Table of n, a(n) for n = 2..100

Example

.3...5..11
17...7..13
23..29..19
sums along rows: 3+5+11 = 19, 17+7+13 = 37, 23+29+19 = 71,
sums along columns: 3+17+23 = 42, 5+7+29 = 41, 11+13+19 = 43,
sums along diagonals: 3+7+19 = 29, 11+7+23 = 41.

Crossrefs

Sequence in context: A255106 A253039 A237229 * A249535 A350702 A340957

Adjacent sequences: A219523 A219524 A219525 * A219527 A219528 A219529

Keyword

nonn

Author

Zak Seidov, Nov 21 2012

Status

approved