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A072679
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a(n) = (3*(n-1)+3)! *(3*(n-1)+6)! *2F2(3*n+1,3*n+4; 4,7; 1)/( 3! *6! *exp(1)), where 2F2(;;) is the generalized hypergeometric series.
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1
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1, 207775, 566828686621, 9011375448568566265, 545354187810192396620158501, 96830939680123110993863214244502671, 42331916293179268263941025436198550595621985
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