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 A342457 Terms of A342456 prime-shifted so far towards lower primes that they become even: a(n) = 2*A246277(A342456(n)). 4
 2, 2, 2, 4, 2, 4, 6, 6, 2, 4, 64, 16, 324, 36, 10, 36, 2, 4, 64, 16, 2304, 96, 486, 24, 7290, 104976, 21600, 1296, 1708593750000, 100, 93750, 10, 2, 4, 64, 16, 144, 6, 216, 6, 172186884, 7776, 2160, 216, 216000000, 236196, 10497600, 54, 10935000000000, 53144100, 1476225000000, 7290, 122500000000, 10935000, 140, 360 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS These terms have the same prime signature as the corresponding terms in A342456, thus applying omega and bigomega to these gives the same derived sequences A342461 and A342462. LINKS FORMULA a(n) = 2*A246277(A342456(n)) = 2*A329038(A329886(n)). PROG (PARI) A246277(n) = if(1==n, 0, my(f = factor(n), k = primepi(f[1, 1])-1); for (i=1, #f~, f[i, 1] = prime(primepi(f[i, 1])-k)); factorback(f)/2); A342457(n) = 2*A246277(A342456(n)); \\ Uses also code from A342456. CROSSREFS Cf. A246277, A276086, A283980, A329038, A329886, A342456, A342461 [= A001221(a(n))], A342462 [= A001222(a(n))], A342464 [= A051903(a(n))]. Sequence in context: A130127 A217982 A184727 * A286849 A098069 A173738 Adjacent sequences: A342454 A342455 A342456 * A342458 A342459 A342460 KEYWORD nonn AUTHOR Antti Karttunen, Mar 15 2021 STATUS approved

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Last modified January 29 15:29 EST 2023. Contains 359923 sequences. (Running on oeis4.)