Number of n-digit positive integers where all pairs of consecutive digits have a difference of at least 7.

A383079

Number of n-digit positive integers where all pairs of consecutive digits have a difference of at least 7.

Terms

    a(0) =9a(1) =9a(2) =22a(3) =48a(4) =109a(5) =244a(6) =549a(7) =1233a(8) =2771a(9) =6226a(10) =13990a(11) =31435a(12) =70634a(13) =158713a(14) =356625a(15) =801329a(16) =1800570a(17) =4045844a(18) =9090929a(19) =20427132a(20) =45899349a(21) =103134901a(22) =231742019a(23) =520719590a(24) =1170046298a(25) =2629070167a(26) =5907467042a(27) =13273957953a(28) =29826312781a(29) =67019116473

External references