A267298 Integers k such that the k-th prime divides the product of the first k nonzero Jacobsthal numbers.

5, 11, 14, 21, 24, 30, 31, 36, 53, 54, 55, 60, 61, 63, 67, 68, 78, 84, 88, 95, 105, 110, 113, 115, 116, 117, 122, 124, 125, 131, 141, 152, 162, 164, 170, 174, 176, 177, 184, 185, 192, 196, 199, 204, 216, 226, 234, 245, 255, 260, 267, 273, 275, 279, 280, 304, 305, 316, 319, 324, 339, 349, 356, 358, 366

Offset: 1

Author

Altug Alkan, Apr 07 2016

Keywords

• nonn

Comments

If any A001045(j) has a prime divisor p where p is the k-th prime for 1 <= j <= k, then k is a term of this sequence.

Examples

			5 is a term because A001045(5) = 11 is divisible by 11.
		

Crossrefs

Cf. A001045, A269694.

Programs

PARI

a001045(n) = (2^n - (-1)^n) / 3;
lista(nn) = for(n=1, nn, my(p = prime(n)); if (lift(prod(i=1, n, Mod(a001045(i), p))) == 0, print1(n, ", ")));