Expansion of Sum_{n>=0} (3*n)!/n!^3 * x^(2*n)/(1-x)^(3*n+1).

A208425

Expansion of Sum_{n>=0} (3*n)!/n!^3 * x^(2*n)/(1-x)^(3*n+1).

Terms

    a(0) =1a(1) =1a(2) =7a(3) =25a(4) =151a(5) =751a(6) =4411a(7) =24697a(8) =146455a(9) =862351a(10) =5195257a(11) =31392967a(12) =191815339a(13) =1177508515a(14) =7276161907a(15) =45154764025a(16) =281492498455

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