A320112 a(n) = Product_{d|n, d>1} prime(1+(d mod 12)).

1, 5, 7, 55, 13, 595, 19, 1265, 203, 2015, 37, 13090, 3, 475, 637, 13915, 13, 293335, 19, 509795, 3857, 5735, 37, 602140, 39, 75, 1421, 57475, 13, 28534415, 19, 320045, 7511, 2015, 9139, 12906740, 3, 475, 147, 128978135, 13, 27866825, 19, 1450955, 535717, 5735, 37, 13247080, 57, 30225, 637, 9075, 13, 34906865, 9139, 30404275, 3857, 2015, 37

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..8192

Formula

a(n) = Product_{d|n, d>1} prime(1+(d mod 12)).

Prog

(PARI) A320112(n) = { my(m=1); fordiv(n, d, if(d>1, m *= prime(1+(d%12)))); (m); };

Crossrefs

Cf. A319985, A320108, A320114, A320116.

Cf. A320113 (rgs-transform).

Sequence in context: A376613 A320116 A320108 * A284380 A082714 A300090

Adjacent sequences: A320109 A320110 A320111 * A320113 A320114 A320115

Keyword

nonn

Author

Antti Karttunen, Oct 06 2018

Status

approved