A260714 Row 4 of A260717.

7, 11, 13, 17, 23, 25, 29, 31, 37, 41, 43, 47, 53, 55, 59, 61, 67, 71, 73, 77, 83, 85, 89, 91, 97, 101, 103, 107, 113, 115, 119, 121, 127, 131, 133, 137, 143, 145, 149, 151, 157, 161, 163, 167, 173, 175, 179, 181, 187, 191, 193, 197, 203, 205, 209, 211, 217, 221, 223, 227, 233, 235, 239, 241, 247, 251, 253, 257

Offset

1,1

Links

Table of n, a(n) for n=1..68.

Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 0, 0, 0, 1, -1).

Formula

Other identities. For all n >= 1:

a(1+(7*(n-1))) = A255414(n).

a(n) ~ 15*n/4. - Charles R Greathouse IV, May 28 2026

Prog

(Scheme) (define (A260714 n) (A260717bi 4 n)) ;; Code for A260717bi given in A260717.
(PARI) a(n)=(n-1)\8*30+[31, 7, 11, 13, 17, 23, 25, 29][n%8+1] \\ Charles R Greathouse IV, May 28 2026

Crossrefs

Row 4 of A260717.

Setwise difference of A007310(2..) \ A255413.

Cf. A255414 (only every seventh term of this sequence, starting from 7).

Sequence in context: A270999 A103486 A086843 * A049481 A175412 A173700

Adjacent sequences: A260711 A260712 A260713 * A260715 A260716 A260717

Keyword

nonn,easy

Author

Antti Karttunen, Jul 30 2015

Status

approved