Partial sums of floor(Pi^n).

Terms

a(0) =1a(1) =4a(2) =13a(3) =44a(4) =141a(5) =447a(6) =1408a(7) =4428a(8) =13916a(9) =43725a(10) =137373a(11) =431577a(12) =1355846a(13) =4259523a(14) =13381694a(15) =42039839a(16) =132072059a(17) =414916622a(18) =1303499025a(19) =4095062974a(20) =12865019770a(21) =40416651612a(22) =126972655803a(23) =398896362696