a(n) = sum of numbers without digit 1 and with product of digits = n-th 7-smooth number.

Terms

a(0) =0a(1) =2a(2) =3a(3) =26a(4) =5a(5) =61a(6) =7a(7) =296a(8) =42a(9) =77a(10) =942a(11) =99a(12) =88a(13) =3264a(14) =1108a(15) =1098a(16) =110a(17) =13338a(18) =55a(19) =465a(20) =1342a(21) =2341a(22) =35906a(23) =132a(24) =21869a(25) =14806a(26) =2807a(27) =1375a(28) =179141a(29) =77