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A121079
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Sum_{i=0..n} C(n,i)^2*i!*4^i + 2^n*n!.
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1
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2, 7, 57, 757, 13889, 322021, 8962225, 289928549, 10666353409, 439225736005, 19999574572721, 997265831223685, 54028099173536449, 3159178743189436709, 198259676112757095985, 13289233274778582230821, 947420482287986880154625, 71574264415491967142194309
(list; graph; refs; listen; history; internal format)
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