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Q(p)/p where p runs through the primes and Q(k) is the k-th central quadrinomial coefficient (A005190).
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%I #10 Mar 08 2023 12:24:22

%S 2,4,31,304,40044,500522,86094668,1167752848,225001039696,

%T 652498288154820,9451735761626880,29731605314969017772,

%U 6529673496702876605072,97300805803445759460364

%N Q(p)/p where p runs through the primes and Q(k) is the k-th central quadrinomial coefficient (A005190).

%H M. F. Hasler, <a href="/A087186/b087186.txt">Table of n, a(n) for n = 1..100</a>

%Y Cf. A005190.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Oct 19 2003