First diagonal of an array, generated from the sequence of the nonprimes.

Terms

a(0) =1a(1) =7a(2) =22a(3) =58a(4) =142a(5) =334a(6) =766a(7) =1726a(8) =3837a(9) =8435a(10) =18364a(11) =39646a(12) =84986a(13) =181117a(14) =384160a(15) =811676a(16) =1709425a(17) =3590213a(18) =7522354a(19) =15728427a(20) =32827027a(21) =68405533a(22) =142344708a(23) =295824870a(24) =614046159a(25) =1273068141a(26) =2636250146a(27) =5452584131a(28) =11264148401a(29) =23242423457