A249827 - OEIS

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A249827

Row 3 of A246278: replace in 2n each prime factor p(k) with prime p(k+2).

3

5, 25, 35, 125, 55, 175, 65, 625, 245, 275, 85, 875, 95, 325, 385, 3125, 115, 1225, 145, 1375, 455, 425, 155, 4375, 605, 475, 1715, 1625, 185, 1925, 205, 15625, 595, 575, 715, 6125, 215, 725, 665, 6875, 235, 2275, 265, 2125, 2695, 775, 295, 21875, 845, 3025, 805, 2375, 305, 8575, 935, 8125, 1015, 925, 335, 9625, 355, 1025, 3185, 78125, 1045, 2975, 365

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OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A003961(A249734(n)).

a(n) = A003961(A016945(A048673(n)-1)).

a(n) = A084967(A249824(n)). [Permutation of A084967.]

PROG

(Scheme)

(define (A249827 n) (A003961 (A249734 n)))

(define (A249827 n) (A246278bi 3 n)) ;; Alternative implementation. Code for A246278bi given in A246278.

CROSSREFS

Row 3 of A246278.

Cf. A003961, A016945, A048673, A084967, A249824, A249734.

Sequence in context: A070391 A375154 A084967 * A343734 A279541 A361615

Adjacent sequences: A249824 A249825 A249826 * A249828 A249829 A249830

KEYWORD

nonn,changed

AUTHOR

Antti Karttunen, Nov 23 2014

STATUS

approved