This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A055923 #19 Oct 09 2019 10:49:29 %S A055923 1,0,1,1,1,1,3,2,3,4,4,6,8,8,10,13,13,20,20,24,26,38,35,51,51,65,67, %T A055923 92,86,121,117,153,155,209,197,270,262,339,341,444,425,565,555,703, %U A055923 711,903,884,1135,1128,1397,1430,1766,1757,2193,2214,2691,2762,3344 %N A055923 Number of partitions of n in which each part occurs a prime number (or 0) times. %H A055923 Vaclav Kotesovec, <a href="/A055923/b055923.txt">Table of n, a(n) for n = 0..10000</a> (terms 0..1000 from Alois P. Heinz) %F A055923 EULER transform of b where b has g.f. Sum {k>0} c(k)*x^k/(1-x^k) where c is inverse EULER transform of characteristic function of prime numbers. %F A055923 G.f.: Product(1+Sum(x^(i*prime(k)), k=1..infinity), i=1..infinity). - _Vladeta Jovovic_, Jan 08 2005 %p A055923 b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0, %p A055923 add(`if`(isprime(j), b(n-i*j, i-1), 0), j=1..n/i) +b(n, i-1))) %p A055923 end: %p A055923 a:= n-> b(n$2): %p A055923 seq(a(n), n=0..60); # _Alois P. Heinz_, May 31 2014 %t A055923 b[n_, i_] := b[n, i] = If[n == 0, 1, If[i<1, 0, Sum[If[PrimeQ[j], b[n-i*j, i-1], 0], {j, 1, n/i}] + b[n, i-1]]]; a[n_] := b[n, n]; Table[a[n], {n, 0, 60}] (* _Jean-François Alcover_, Nov 11 2015, after _Alois P. Heinz_ *) %Y A055923 Cf. A000041, A007690, A055922. %K A055923 nonn %O A055923 0,7 %A A055923 _Christian G. Bower_, Jun 23 2000