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 A325823 Sum of unitary proper divisors of A228058(n): a(n) = A034460(A228058(n)). 4
 15, 23, 27, 55, 39, 39, 47, 51, 87, 43, 63, 71, 127, 63, 83, 55, 99, 67, 175, 107, 111, 63, 119, 123, 67, 95, 147, 79, 159, 99, 167, 79, 295, 87, 183, 135, 191, 203, 207, 367, 87, 99, 91, 139, 239, 243, 251, 795, 115, 267, 111, 279, 123, 287, 127, 291, 103, 303, 535, 135, 323, 139, 327, 187, 715, 111, 119, 347, 359, 363, 123, 383 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Antti Karttunen, Table of n, a(n) for n = 1..25000 FORMULA a(n) = A034460(A228058(n)). a(n) = A325824(n) - A325379(n). PROG (PARI) up_to = 10000; isA228058(n) = if(!(n%2)||(omega(n)<2), 0, my(f=factor(n), y=0); for(i=1, #f~, if(1==(f[i, 2]%4), if((1==y)||(1!=(f[i, 1]%4)), return(0), y=1), if(f[i, 2]%2, return(0)))); (y)); A228058list(up_to) = { my(v=vector(up_to), k=0, n=0); while(k

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Last modified July 29 09:31 EDT 2021. Contains 346344 sequences. (Running on oeis4.)